Ecosystem services

These include provisioning services such as food and water; regulating
services such as flood and disease control; cultural services such as spiritual,
recreational, and cultural benefits; and supporting services such as nutrient
cycling that maintain the conditions for life on Earth.

Supporting services are: Ecosystem services that are
necessary for the production of all other ecosystem services. Some examples
include biomass production, production of atmospheric oxygen, soil formation and
retention, nutrient cycling, water cycling, and provisioning of habitat.